Britney's Stay Will Be Extended

2/2/2008 8:15 PM PST BY TMZ STAFF

It's not a done deal, but expect that sometime tonight, papers will be signed at UCLA extending Britney Spears' stay at the psych ward -- by 14 days.

It's an internal process -- done without a court order. But we're told it will indeed happen, and that's not surprising given her mental health. As we first reported, Britney's been diagnosed with severe bipolar disorder.

The ward Britney is in is considered one of the best in the nation for the treatment she is receiving.